Disk array system with controllers that automate host side of ATA interface
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United States of America Patent
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Apr 15, 2003
Grant Date -
Nov 21, 2002
app pub date -
May 9, 2002
filing date -
Nov 14, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A disk array system comprises a plurality of automated controllers, each of which implements a host side of a standard ATA interface protocol within automated circuitry to control a respective disk drive. Each automated controller preferably includes a command buffer for storing disk drive commands to be executed by a respective ATA drive, and a data buffer that stores I/O data being transferred to or from the ATA disk drive. In a preferred embodiment, the automated controllers are connected by a control bus to a microcontroller that dispatches disk drive commands to the automated controllers in response to I/O requests from a host computer, and are also connected by a second bus to an automated processor. The automated processor transfers I/O data between the automated controllers/ATA disk drives and a host computer, and tracks the completion statuses of pending I/O requests.
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